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dinhnam
2 năm trước
1 người đi xe máy khởi hành từ A lúc 8 giờ 30 phút đến B lúc 9 giờ 42 phút . Quãng đường AB dài 60km . Tính vận tốc trung bình của xe máy với đơn vị km/giờ
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means ordinary members of the public buying tickets to travel to space and back. Like any other business, once space tourism gets started it will develop progressively. It may go through several phases. Starting with a relatively small-scale and relatively high-priced "pioneering phase", the scale of activity will grow and prices will fall as it develops. Finally, it will become a mass-market business, like aviation today. During the pioneering phase, customers will be relatively few, from hundreds per year to thousands per year; prices will be high, $50,000 and up; and the service will be nearer to "adventure travel" than to luxury hotel-style. The mature phase will see demand growing from thousands of passengers per year to hundreds of thousands per year. Tickets to orbit will cost less and flights will depart from many different airports. Orbital facilities will grow from being just clusters of modules to large structures constructed in orbit for hundreds of guests, permitting a wide range of orbital entertainments. During the mass phase, ticket prices will fall to the equivalent of a few thousand US dollars, and the number of customers will be from hundreds of thousands to millions of passengers per year. And aviation is still growing fast at today's level of 1 billion passengers per year. So there is no reason to suppose that space travel will ever stop growing. There is certainly no limit to the possible destinations. Task 1 TRue or false T F 1. When space tourism develops, the ticket prices will drop. o o 2. During the pioneering phase, customers have to pay high costs in order tostay in luxury o o hotel-style spaceships. 3. During the mature phase, orbital structures made on the Earth will provide a wide range o o of entertainments. 4. The more space tourism develops, the less aviation grows. o o 5. Maybe some day in the future, space tourism is as popular as aviation. o o 6. Space travel will send passengers to destinations that know no limit. o o Task2: find world 1. gradually (paragraph 1): ____________ 2. the flying of aircraft (paragraph 1): ____________ 3. a unit that forms part of something bigger (paragraph 3): ____________ 4. the path taken by a spacecraft going round a planet (paragraph 3):

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